Power supply units

Each Storwize® V3500 enclosure contains two power supply units. Each power supply unit can provide power to the whole enclosure.

Each AC power supply unit contains the components that are shown in Figure 1. Each power supply also contains fans that cool the enclosure. Cool air is drawn in through the front of the enclosure. The air passes over the drives, node canisters, and power supplies. The warmed air is ejected through the rear of each power supply. For optimal cooling, do not obstruct the airflow and ensure that all enclosure components or fillers are installed while the system is operational.

Note: The power supply does not have a power switch. A power supply is active when a power cord is connected to the power connector  4  and to a power source.
Figure 1. Power supply unit
  •  1  Release tab
  •  2  Handle
  •  3  Power supply LED indicators
  •  4  AC power connector

Power supply unit LED indicators

Table 1 lists the LED indicators on the power supply, next to the AC power connector.

Table 1. Power supply LED indicators. Enclosure power supply indicators and status
Name Symbol Color State Meaning
Input current status (AC) Input current status icon Green OFF No input power detected.
ON Input power detected.
DC output status Direct current output status icon Green OFF The power supply is not providing DC output to the enclosure.
ON The power supply is providing DC output to the enclosure.
Fault Fault icon Amber OFF No fault detected.
ON A fault within the power supply has been detected.
  Icon not used Blue   Not used.